#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <pthread.h>

pthread_cond_t cond;
pthread_mutex_t mutex;

void *r1(void *arg)
{
    while(1)
    {
        pthread_cond_wait(&cond,&mutex);
        printf("活动\n");
    }
}

void *r2(void *arg)
{
    while(1)
    {
        pthread_cond_signal(&cond);
        sleep(1);
    }
}

int main()
{
    pthread_t t1,t2;

    pthread_cond_init(&cond,NULL);
    pthread_mutex_init(&mutex,NULL);

    pthread_create(&t1,NULL,r1,NULL);
    pthread_create(&t1,NULL,r1,NULL);

    pthread_join(t1,NULL);
    pthread_join(t2,NULL);

    pthread_mutex_destroy(&mutex);
    pthread_cond_destroy(&cond);

    return 0;
}










